Insulator



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A .5 1918. 1 371 55 Patented Mar. 15, 1921 HENRYW. BULLBR.

M (T l 613 01142;

PATENT OFFICE.

HENRY W. BULLER, OF FREMONT, NEBRASKA.

INSULATOR.

Specification of Letters Patent.

Patented Mar. 15, 1921.

Application filed April 5, 1918. Serial No. 226,931.

To all whom it may concern:

Be it known that I, HENRY IV. BULLER, a citizen of the United States, residing at Fremont, in the county of Dodge and State of Nebraska, have invented certain new and useful Improvements in Insulators, of which the following is a specification.

This invention relates to insulators, and particularlyto that class used in connection with wires for transmission of electrical currents.

The objects of the invention are to provide an improved, integral insulator which may be cast of glass, porcelain or similar material at low cost, having parts of suchform and arrangement that a line of wire may be sustained in position for use without the labor and expense heretofore required for splicing the wire to the insulator, and to provide means for preventing water from accumulating on the insulator, with attendant deterioration of the wire by rust.

A further object is to provide an insulator that will operate in any position or at any angle, will permit the transmission wire, to turn right angles or be passed under bridges, and to provide means for attaching the wire in an immovable position in the conventional manner where occasion may re quire.

lVith these objects in view and others to be hereinafter mentioned, the invention pre sents a novel construction as described and claimed.

In the drawing, Figure 1 is a side elevation of the insulator, its threaded interior for receiving a core being indicated by dotted lines. Fig. 2 is a transverse longitudinal sectional View taken on line 22 of Fig. 3. Fig. 3 is a plan view of the insulator. Fig. 4 is a side elevation taken at right angles to the view shown in Fig. 1, and Fig. 5 is also a side elevation showing the side opposite to that shown in Fig. 4.

Referring now to the drawing I provide a casting or integral part 7 of any suitable insulating material but preferably constructed of glass, its inner end having an interiorly threaded part 8 for receiving a core (not shown).

In order that an electrical conductor, or

wire may be securely held and may be suitably insulated, and may be quickly mounted and may be conveniently removed whenever required, I provide a channel 9, opening ing the upper end of the casting into two horns.

By referring to Fig. 3 of the drawing, it

will be seen that this channel is bow-shaped in plan, its convex and concave walls being indicated respectively at 10 and 11, and as best shown in Figs. 1 and 5, the casting'is so formed that curved prongs 12 are provided and overhang the ends of said channel, said prongs projecting longitudinally, and inwardly at their terminals, and it will be un derstood that when an electrical conductor, metallic strand or wire is mounted upon the herein described insulator it will be disposed in said channel, and may engage said prongs, and normally will not engage any part of the concave wall 11 except the parts thereof inwardly of the prongs 12.

As best shown in Figs. 1 and 2, the convex wall 10 is undercut to provide a prong 13 which projects longitudinally and inwardly of the insulator, and it will be understood that this prong, operates as a detent for the electrical conductor or wire.

It will be noted that the wall 10 of the insulator projects longitudinally beyond the wall 11 and has a concave face a, and preferably, the bow-shaped channel 9 is formed curved downward and outward as indicated at b, and the terminal part of the insulator adjacent to the concave wall 11 is formed fiat,

as indicated at 0. Also, as best shown in Figs. 1 and 5, the channel 9 is curved longitudinally as well as transversely of the casting to provide-a drain or water shed. Numeral 14 indicates an annular groove for use when it is desired to secure a. wire to the insulator by conventional splicing.

In operation the wire is laid on the flat surface 0 and manually pressed against the concave face a of the wall 10 and downwardly into the channel 9.

The wire being stretched in the conventional manner from one insulator to another, it is obvious that by operation of the prongs above mentioned, it will be maintained in the channel, and any water falling into the channel will be conducted to the sides of the insulator, on account of the water shed, and permitted to escape.

By use of the invention, labor and material required to fasten a transmission wire to each insulator is saved, however at intervals of one-half to one mile or as occasion may require the wire may be secured or spliced to the insulator in a conventional manner by use of the annular groove 14.

It will be noted that the insulator can be i used effectively, when placed in position at any angle or may be inverted, which latter transverse groove in its upper end, said groove being curvedlaterally'in two direc-V tions at right; angles to each other, said 7 V groove dividing the top, of the body into two parts, one part being higher than theother and leaving a verticallyconcave and horizontally convex face neat to the other part, said part having the vertically concave and horizontally convex face also being provided with a recess beneath a portion thereof, said recess being in communication with the groove, said last referred to part also having a projection depending into the groove,

and the other part having lugs at the sides thereof extending beyond the sides of the body having undercut notches to engage a wire.

In testimony whereof, I have affiXed my signature 1n presence or two witnesses.

t HENRY w; B LLER...

Vitnessies: 1

' NEIL D. SAvIL ng HOWARD HEN 

